Ippen (1239-1289) was a wandering hijiri (holy man) and religious leader whose movement developed into one of the major schools of medieval Japanese Buddhism. In his life and thought we find elements of folk practices and mountain austerities, the critical spirit of Zen, and the cosmic vision of esoteric traditions. This volume presents a translation of all of Ippen's extant writings, including letters and verse, together with records of his spoken words.